From BugSigDB

The fourth stomach of ruminating animals, which is an elongated pear-shaped sac lying on the floor of the abdomen, on the right-hand side, and roughly between the seventh and twelfth ribs. It leads to the beginning of the small intestine. (Adapted From Black's Veterinary Dictionary, 17th ed)
  • Fourth stomach
  • Maw
  • Read
  • Rennet-bag
  • Ruminant true stomach